Locomotive driving gear



July 12, 19.32. H. J. BENNETT LOCOMTIVE DRIVING GEAR Original Filed April 8. 1930 2 Sheets-Sheet QN n Q R. Mx QN. l NN m N W N\ N E N 5 H e@ m E A S m J. n Y 25 ,l ,\x 9 Q m S M @mit W QQ ..\N. HH -H UHHHWHMHHHMH TN 5 Sw w. Q \u\ Q NN f \N.. NNJ Q `Qd NN N u @l N V i .Q \w\ W @M HHIWIHWHMHHHNMMH THNHH 1| Q m N11 QN mi .dui l! H. J. BENNETT LOCOMOTIVE DRIVING GEAR Original Filed April 8, 1930 July 12, 1932.

2 Sheets-Sheet 2 INVENTOR.

ATTORNEYS.

Patented July 12,1932

UNITED STATES HARRY .'r. BENNETT, or PHOENIX, ARIZONA Locoivio'rivn DRIVING GEAR Application filed April 8, 1930, Serial No. 442,627'. Renewed January 4, 1932.

My invention relates to driving gears for steam locomotives, and it has for a purpose the provision of a driving gear which is structurally and functionally characterized by directly transmitting power from the pistons to the driving wheels of the locomotive to the end of developing maximum power at the driving wheels; imparting push and pull inipulses simultaneously to the driving wheels lo at each side of the locomotive; and displacing the main and connecting rods of the conventional driving gear with elimination of the attendant disadvantages such as the enormous weight of the rods and the side sway of the locomotive, resultant of the vertical motion of these rods and the damage to the roadbed and rails in the event of the rods breaking or becoming disconnected when the driving gear is operating at high speeds.

I will describe only one forni of locomotive driving gear embodying my invention, and will then point out the novel features thereof in claims.

In the accompanying drawings:

Fig. 1 is a view showing in top plan the chassis or frame of a locomotive having applied thereto one form of driving gear enibodying my invention. Y

Fig. 2 is a vertical transverse sectional view 30 taken on the line 2-2 of Fig. 1.

Fig. 3 is a view showing the driving gear in side elevation and in association with a locomotive.

Fig. 4 is a vertical longitudinal sectional 35 view taken on the line 4-4 of Fig. 1.

The several views are semi-diagrammatic. The locomotive here illustrated has a frame F supported for rolling movement by two pairs of driving wheels D and D disposed at 40` opposite sides of the frame, and mounted on axles A. The usual driving cylinders C and C are arranged at the forward end of. the frame F, and their pistons P and P have rods R and R extending rearwardly from 45 the cylinders for connection to the driving y The two driving gears-embodying my in- 'Y vention, one for each pair of driving wheels D and D are identical in construction, and

hence-a description of the construction of one will suffice for both.; Y

.as best illustrated-in Fig. 1,` the opposite ends of the frame F are formed with lateral extensions 15 and 1 16 to which the opposite ends yof a pair of guides 17 aresecured in spaced parallel relation -to accommodate a i Y y pair. of cross heads 18 and in such manner 66 that the crossheads .are slidable longitudinally between vthe guides.V As shown in-FignQ,

the opposite sides of each cross head 18 are formed with grooves llaiin which the guide bars 17 are received and so as to confine the .cross heads against displacement con `the guides. These cross heads are formed `integral with the driving rod 19 so that the latter is supported forrectilinear movement be- Y tween the guides and with its forward end directly connected to the corresponding piston rod R `or R through the medium` of the respective crossvhead K or K. This connection is such that the driving rod 19-is longitudinally aligned with and rigidly connected to the corresponding piston rod so that reciprocating movement of the latter is directly transmitted to the drivingrod. Allt will of course be `understood that a rigid connection is-not necessary so long as theconnection is such that movement of the piston .rod is directly transmitted to the driving rod. 'l

' Through the mediumV of links 2()V and 21 the respective cross heads 18 are operatively connected to the corresponding driving wheels D or D, these links being pivotally connected tothe cross'heads by pins 21%' and eccentrically connected, to the driving wheels by crank pins22.4 The Vcrank pins of'onepair of'wheelsD-orjD are'disposed at the same point about the aXis of the wheels as will be clear fromva consideration of Fig. 3, but from these crank pins, the links extend in opposite directions in order to transmit push and pull impulses to the driving wheels, as will be more fully described hereinafter. `However,

the links for the other pair of driving wheels Yare connected at different points, and preferably at points approximately 90 to the rear in order that oneY driving gear may operate in advance of the other to eliminate a dead centerposition. y

In theoperation'of the ,f driving gears, the driving rods 19 are reciprocated under wheels connected -to the respective driving rod at the cross heads and tol the driving wheels so that under movement of the driving rods in either direction push and pull impulses are transmitted, respectively, to the two driving wheels of each pair, the links for one pair of wheels being connected to' the respective wheels in advance `circumferentially of the connection of the other pair'of links to the other'pair of wheels.

` HARRY J. BENNETT.

movement of the pistons P, and by reason of their direct rconnections with the pist-on rods, power is transmitted directly `t0 the vdriving rods" VUnder the guidance of the crosshea'ds 18 and the guides 1,7,.thedrivingfrodsaregra stricted to" `a rectilinear movement, and ,through lthe ,mediumof the links 20, `the .re- CPPOCngmOtion of-.thefdrivifng rod `iscon- `vertedinto,a ,rotary motion for drivingfthe i .ing wheels, Yal pulling impulse is .imparted wheels D and D.4 By reasonof theopposite positioningofithe-links for one pair of driv- Aearembod 'infr m invention it isto beun- ZD 7 derstood'that-.various changes andmod-ications may loe-made therein withoutdeparting fromthe spiritof thelinventionandthespirit and scope ofthe appended claims. i

I claim vas `my. invention: 1. ln a locomotive, a pair of'drifvingiwheels *.described only one-form of'locomotive driving The .other driving -*gear .operates f ICQ arranged one .in .advanceof vthe other, .adriving cylinder inzadvance of the ydriving wheels, adriving .rod longitudinally,alignedy and-connected to the piston rod of the driving cylinder, f1-frame in which .the driving ,rod moves las .in a rectiilinear path,1and links connected r e Y. Y spectively, `to the drivingV rod at the cross heads and -.to the driving wheelseso .that .under movement of the driving rod in .either directiOn .-pushand pull impulses aretransmitted,-

Y respectively, to the two :driving wheels.

' 2. In a locomotive,1two pairs .of driving wheels arranged atopposi'te sides .of the los comotive body, with the wheels of each pair Y positioned one in adyance of the other, a pair of driving .cylinder-sone foreach pair of the Vwheels :with eachV cylinder :arranged 1in advance of the respective driving wheels, apair ofl ,driving rods 1oneforeach lpain of wheels longitudin ally aligned .and vconnected -to the piston Vrod of: the respective,drivin-1gcylinder,V Y

alpair off-ramesin which the respective-driving-rods move -in rectilinear' paths,'andf.two Y pairs off; links ,one tor each pair liof. `driving 

